List of Best Programming interviews Questions with Examples. Top OOP(Object Oriented Language) concepts with examples.Difference Between Abstract Class and Interfaces.
Abstracts
An abstract class is, conceptually, a class that cannot be instantiated and is usually implemented as a class that has one or more pure virtual (abstract) functions
Example
class Abstract Class {
public: virtual void AbstractMemberFunction() = 0; // Pure virtual function makes
// this class Abstract class. virtual void NonAbstractMemberFunction1(); // Virtual function.
void NonAbstractMemberFunction2(); };
Interfaces
An interface has no implementation.
An interface class contains only a virtual destructor and pure virtual functions.
Example
class shape // An interface class {
public: virtual ~shape(); virtual void move_x(int x) = 0;
virtual void move_y(int y) = 0; virtual void draw() = 0; //… };
